EP2408347B1 - Medizinisches, insbesondere zahnmedizinisches diagnosegerät mit bilderfassungsmitteln - Google Patents

Medizinisches, insbesondere zahnmedizinisches diagnosegerät mit bilderfassungsmitteln Download PDF

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Publication number
EP2408347B1
EP2408347B1 EP10711650.1A EP10711650A EP2408347B1 EP 2408347 B1 EP2408347 B1 EP 2408347B1 EP 10711650 A EP10711650 A EP 10711650A EP 2408347 B1 EP2408347 B1 EP 2408347B1
Authority
EP
European Patent Office
Prior art keywords
window
diagnostic device
heating
medical
medical diagnostic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP10711650.1A
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German (de)
English (en)
French (fr)
Other versions
EP2408347A1 (de
Inventor
Sven Erdmann
André HACKEL
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kaltenbach and Voigt GmbH
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Kaltenbach and Voigt GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kaltenbach and Voigt GmbH filed Critical Kaltenbach and Voigt GmbH
Priority to EP14197962.5A priority Critical patent/EP2888992A1/de
Publication of EP2408347A1 publication Critical patent/EP2408347A1/de
Application granted granted Critical
Publication of EP2408347B1 publication Critical patent/EP2408347B1/de
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/24—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor for the mouth, i.e. stomatoscopes, e.g. with tongue depressors; Instruments for opening or keeping open the mouth
    • A61B1/247—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor for the mouth, i.e. stomatoscopes, e.g. with tongue depressors; Instruments for opening or keeping open the mouth with means for viewing areas outside the direct line of sight, e.g. dentists' mirrors
    • A61B1/253—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor for the mouth, i.e. stomatoscopes, e.g. with tongue depressors; Instruments for opening or keeping open the mouth with means for viewing areas outside the direct line of sight, e.g. dentists' mirrors with means for preventing fogging
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00064—Constructional details of the endoscope body
    • A61B1/00071—Insertion part of the endoscope body
    • A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A61B5/0082—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes
    • A61B5/0088—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes for oral or dental tissue
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
    • A61B1/05—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances characterised by the image sensor, e.g. camera, being in the distal end portion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/12—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with cooling or rinsing arrangements
    • A61B1/127—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with cooling or rinsing arrangements with means for preventing fogging

Definitions

  • the present invention relates to a medical, in particular a dental diagnostic device according to the preamble of claim 1, which comprises means for image acquisition and a handpiece with a befindlichem in the beam path of the means for image acquisition window, wherein further heating of the window is provided.
  • the present invention relates to a so-called intraoral camera or a system for transilluminating teeth.
  • Intraoral cameras which include a handpiece, the front end portion is inserted into the mouth of a patient. In this end region is usually a light entry or viewing window for the camera optics, starting from which the image of the object to be examined of a detection device, for example. A CCD chip is transmitted.
  • This classic intraoral camera can also be extended to a system for transilluminating teeth, as for example.
  • the tooth to be examined is irradiated with visible light, in which case an optical image of the tooth illuminated by the examination radiation is recorded and evaluated. Since carious sites in the tooth scatter the light differently than healthy tooth tissue, such sites can be identified on detection of the tooth with the aid of a camera.
  • WO 97/31293 and the US 5,605,532 can be removed medical diagnostic equipment having image sensing means, wherein heating means are provided which allow a heating of a window pane.
  • the present invention has for its object to provide a novel solution to avoid the above problems.
  • the possibility should be opened to simply and effectively heat the viewing window of a medical or dental diagnostic device, which has image acquisition means.
  • the solution according to the invention is based on the idea of heating the camera window with the aid of resistance heating.
  • the carrier element is formed by a printed circuit board, which has an optical passage, which allows the passage of light through the window and the transmission to the means for image detection, wherein the conductor tracks are arranged in the meandering in the surrounding area of the optical passage.
  • the solution according to the invention is characterized in that it allows a displacement of the lighting fixtures in the direction of the proximal end of the handpiece in the realization of an independent window heating.
  • the head portion of the handset can be made particularly compact, which brings significant advantages in terms of handling of the device and the conduct of investigations.
  • the solution according to the invention leads to an extremely accurate and reliable heating of the window, resulting in additional benefits during operation.
  • the carrier element can be, for example, a conventional printed circuit board, a so-called MID (Molded Interconnected Device) as a two-component plastic injection molding or an MID as a one-component plastic injection molded part, which was produced in the LDS (Laser Direct Structuring) method, act.
  • the carrier element may have additional additional electronic components, for example, resistors or temperature measuring elements. If temperature measuring elements are used, the means for heating the window preferably also include a control unit which is designed to regulate a current flowing through the conductor track arrangement. In this way, a reliable heating of the camera window within a desired temperature range can be achieved.
  • the means for heating the window are preferably sheathed or integrated in an insulating material in order to comply with the required creepage distances and clearances. A risk to the patient during the use of the device can be excluded in this way.
  • the diagnostic device according to the invention may in particular be an intraoral camera or a device which is part of a system for transilluminating teeth.
  • the concept of the window heating according to the invention is also applicable to other medical diagnostic equipment, such as catheters, endoscopes and the like.
  • the Fig. 1a and 1b As a possible application example of the present invention show the front end portion of a handpiece, which is used in a system for transilluminating of teeth.
  • the handpiece provided with the reference numeral 1 has an elongated grip sleeve 2, at the front end of which an attachment 3 is arranged.
  • a tooth to be examined (not shown) is irradiated with light with the aid of this article 3; on the other hand, the resulting image of the illuminated tooth is recorded and evaluated.
  • the examination radiation is usually in a wavelength range of about 550 nm to 790 nm, z. For example, at about 670 nm.
  • the principle of this optical examination is based on the fact that the tissue of the tooth does not completely block the examination radiation, but instead allows the radiation to pass through the radiation Tooth passes. In this case, the radiation is partially scattered, with particular carious areas providing a characteristic influence on the light. If the tooth transilluminated in this way is viewed from different angles, then carious areas can be recognized as they appear a little darker.
  • the dimensions, in particular of the front end area, should be as small as possible. Accordingly, in the illustrated example, neither the light sources nor the actual means for image acquisition, for example.
  • a CCD chip in the article 3 itself arranged (the application of the principle of the invention would of course also be possible with an arrangement of the chip in the article 3), but Rather, they are located in the rear region of the handpiece 1.
  • the light emitted by the light sources arranged in the handpiece 1 is then coupled via optical fibers into the attachment 3 and emitted via a light exit element which is arranged on a lower arm 4 , Opposite the light exit element is a usually circular window 5, via which the image of the illuminated tooth is detected.
  • the window 5 is coupled via optical elements with the image acquisition means, for which purpose primarily mirrors, prisms, lenses and the like are used.
  • Fig. 1b shows a second embodiment of an article 6, wherein in this case the irradiation of the tooth to be examined does not take place on the opposite side of the window 5 but at an angle thereto.
  • the attachment has two lateral arms 7, at the end regions of which the light exit ends of optical fibers are again arranged, which are coupled to the internal light sources.
  • a high-quality image can only be obtained if the light enters through the window 5 undisturbed.
  • the different temperatures inside and outside the oral cavity of a patient as well as different humidity values can cause fogging of the window 5, with the result that at least temporarily no optical recordings can be made.
  • FIG. 2 schematically shows the configuration of the window heater according to the invention and the Fig. 3 to 5 show a concrete embodiment.
  • the solution according to the invention is based on the idea of heating the window 5 directly via a resistance heater.
  • an arrangement of conductor tracks 10 is provided which are directly connected to the window substrate 8 and thermally coupled thereto.
  • the window substrate 8 may, for example, consist of quartz glass, sapphire, plastic or another optically transparent material.
  • the printed conductors 2 can be applied directly to the window substrate 8, but according to the invention it is provided that they are arranged on the surface of a carrier element 11.
  • This carrier element 11 may be a conventional printed circuit board or a so-called MID (Molded Interconnected Device), which may be formed as a two-component plastic injection molded part or as a single-component plastic injection molded part, which was produced in the LDS process.
  • MID Molded Interconnected Device
  • the conductor tracks 10 are arranged in the region of the window 5 such that they lie outside the optical passage 9 for the camera optics and accordingly do not disturb the image transmission to the image acquisition means. If a voltage is now applied to the printed conductor arrangement 10 via a schematically illustrated power supply source 12, this leads to the development of heat loss due to the resistance of the conductor tracks 10, which leads to a heating of the window 5 due to the optimized arrangement of the conductor tracks 10. As a result, fogging of the window 5 can be avoided very effectively.
  • Temperature monitoring takes place via one or more temperature measuring elements 13, which are likewise arranged on the carrier element 11 in the vicinity of the window 5. Taking into account the inevitably resulting temperature difference between the side facing the window 5 and the side facing away from the window 5, the temperature of the window 5 can be determined with sufficient accuracy. This information is then processed by a control unit, not shown, which controls the power source 12 in a corresponding manner and thereby allows accurate control of the window temperature.
  • Fig. 3 to 5 show the concrete embodiment of a support member 11 which is configured in the manner according to the invention, wherein like elements have been given the same reference numerals.
  • the carrier element 11 in this case has a passage opening or an optical passage 11a, which allows the passage of light through the window 5 and the forwarding to the image acquisition means. It can also be seen that a plurality of strands 15 lead to the rear side of the carrier element 11, wherein these strands 15 the Power supply of the tracks 10 takes place. These are preferably arranged in a meandering manner in the surrounding area of the optical passage 11a, so that the window substrate 8 can be heated over its entire area and thus very effectively.
  • the transmission of the output from the temperature measuring elements 13 signals to the control unit via the strands 15th
  • the solution according to the invention is characterized on the one hand by the fact that the window substrate 8 can be heated very quickly and effectively. Furthermore, the means for heating the window 5 occupy only little space, so that they can be arranged as shown directly in the vicinity of the window 5, whereby the effectiveness of the heating is further increased.
  • FIG. 6 Another embodiment of a window heater is in Fig. 6 shown schematically.
  • the heating of the window substrate 8 is now achieved with the aid of a so-called PTC element (Positive Temperature Coefficient).
  • PTC element Platinum Temperature Coefficient
  • heating is achieved by the supply of current to the PTC element 20, wherein the resistance characteristic of the PTC thermistor element 20 is selected so that the element 20 acts self-regulating and accordingly the required maximum temperature of the window 5 to avoid thermal irritation and burns is not exceeded , Additional temperature sensors for detecting the actual window temperature and switching off the heating circuit are not required in this case.
  • the PTC element 20 can be applied directly or indirectly to the window substrate 8.
  • a thermal coupling and electrical insulation can be done by gluing and / or pressing.
  • strands 15 can be connected directly to the PTC element 20 in this variant, for example. Soldered or connected via pin contacts, spring contacts or similar suitable flexible elements.
  • Thermally conductive and electrically insulating materials are suitable as insulation elements 21 for maintaining the required clearances and creepage distances, in particular ceramics (for example AL 3 O 2 ) or plastics with ceramic fillers, for example silicones with ceramic fillers for improving the thermal conductivity.
  • thermally conductive materials are introduced between the individual layers. Such elements can also be used to compensate for unfavorable dimensional or dimensional tolerances.
  • a resistance wire 30 is shown.
  • the resistance wire 30 can be applied directly to the window substrate or connected by means of one or more insulation elements.
  • the resistance wire 30 may be soldered, crimped or similarly connected directly to two current-carrying strands 31.
  • special measures are required to comply with the applicable standards for clearances and creepage distances.
  • the resistance wire must therefore be covered with an electrical insulation 32, for which purpose a hose, a plastic or ceramic part could be used.
  • the loop-shaped resistance wire 30 can then be glued or pressed with or without insulation by means of suitable elements on the - not shown - window substrate.
  • a known heat pipe 40 is provided with an additional element in the form of a heat exchanger plate 41, which has a hole 42 which may be in the center of the window to be heated. It serves to heat the window as homogeneously as possible.
  • the additional element 41 is in this case soldered to the heat pipe or connected in any other way with this.
  • FIG. 13 shows a second embodiment of a heat coupling by means of a heat pipe 40, which is now again in the front region 43 which is arranged on the window substrate, loop-shaped.
  • the solution according to the invention opens up the possibility of heating the window of an intraoral camera in a simple and effective manner.
  • the compact design of the heater according to the invention also ensures a small size of the camera head area, resulting in improved handling of the device.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Veterinary Medicine (AREA)
  • Pathology (AREA)
  • Public Health (AREA)
  • Biophysics (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Optics & Photonics (AREA)
  • Dentistry (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Endoscopes (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
EP10711650.1A 2009-03-17 2010-03-17 Medizinisches, insbesondere zahnmedizinisches diagnosegerät mit bilderfassungsmitteln Active EP2408347B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14197962.5A EP2888992A1 (de) 2009-03-17 2010-03-17 Medizinisches, insbesondere zahnmedizinisches Diagnosegerät mit Bilderfassungsmitteln

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009013615A DE102009013615A1 (de) 2009-03-17 2009-03-17 Medizinisches, insbesondere zahnmedizinisches Diagnosegerät mit Bilderfassungsmitteln
PCT/EP2010/053464 WO2010106102A1 (de) 2009-03-17 2010-03-17 Medizinisches, insbesondere zahnmedizinisches diagnosegerät mit bilderfassungsmitteln

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP14197962.5A Division EP2888992A1 (de) 2009-03-17 2010-03-17 Medizinisches, insbesondere zahnmedizinisches Diagnosegerät mit Bilderfassungsmitteln

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Publication Number Publication Date
EP2408347A1 EP2408347A1 (de) 2012-01-25
EP2408347B1 true EP2408347B1 (de) 2014-12-24

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EP14197962.5A Withdrawn EP2888992A1 (de) 2009-03-17 2010-03-17 Medizinisches, insbesondere zahnmedizinisches Diagnosegerät mit Bilderfassungsmitteln
EP10711650.1A Active EP2408347B1 (de) 2009-03-17 2010-03-17 Medizinisches, insbesondere zahnmedizinisches diagnosegerät mit bilderfassungsmitteln

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EP14197962.5A Withdrawn EP2888992A1 (de) 2009-03-17 2010-03-17 Medizinisches, insbesondere zahnmedizinisches Diagnosegerät mit Bilderfassungsmitteln

Country Status (5)

Country Link
US (1) US9943221B2 (ja)
EP (2) EP2888992A1 (ja)
JP (1) JP5782018B2 (ja)
DE (1) DE102009013615A1 (ja)
WO (1) WO2010106102A1 (ja)

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US8485967B2 (en) * 2010-03-31 2013-07-16 Fujifilm Corporation Endoscopic imaging device and endoscope apparatus having a configuration to prevent condensation
CN103002789B (zh) * 2010-09-22 2015-07-08 奥林巴斯医疗株式会社 内窥镜用温度控制装置

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CN110769732A (zh) * 2017-06-14 2020-02-07 西诺德牙科设备有限公司 用于口内扫描仪的窗口系统
US12096911B2 (en) 2017-06-14 2024-09-24 Dentsply Sirona Inc. Window system for an intraoral scanner

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EP2888992A1 (de) 2015-07-01
US9943221B2 (en) 2018-04-17
US20120034573A1 (en) 2012-02-09
JP5782018B2 (ja) 2015-09-24
JP2012520709A (ja) 2012-09-10
EP2408347A1 (de) 2012-01-25
DE102009013615A1 (de) 2010-09-23
WO2010106102A1 (de) 2010-09-23

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